lustiness vs robustness

lustiness and robustness both are nouns.

Word	Noun	Adjective	Verb	Adverb
lustiness	Yes	No	No	No
robustness	Yes	No	No	No

As nouns, lustiness and robustness are synonyms defined as:

lustiness and robustness: the property of being strong and healthy in constitution

Other synonyms of lustiness include hardiness.

lustiness (noun)	robustness (noun)
the property of being strong and healthy in constitution	the property of being strong and healthy in constitution
	the characteristic of being strong enough to withstand intellectual challenge